Live demo — Grid Sentinel Replay

Open the interactive demo — a real recorded grid oscillation replayed through the certified modal-growth stream monitor, with every claim hash-sealed.

What the demo shows

ISO-NE case 3 of the UTK oscillation test-case library (Maslennikov et al. 2016) — a documented 1.13 Hz regional oscillation from July 2017, real PMU data — is replayed sample by sample through GridModalStreamMonitor. The monitor's operating point is read only from the sealed cross-dataset evaluation artefact (examples/real_data/iso_ne_forced_oscillation/), whose content hash is verified before any value is trusted. The first live alarm fires 57.1 s before the estimated oscillation onset, reproducing the sealed offline decision within stream-step quantisation, and the replay itself seals a record of its own — pacing the replay at wall-clock speed produces a byte-identical seal, because the decisions are deterministic.

The page charts the live growth-rate score, the certified threshold, the estimated onset, and the full alarm log, and lists the three content-addressed hashes (raw capture, sealed evidence, sealed replay record) so anyone with the cited public capture can recompute the claim.

Claim boundary

The demo demonstrates the sealed live pipeline — it is not a statistical generalisation claim. The threshold was calibrated on this system's own pre-onset ambient windows (six windows, three events, permutation p = 0.33); the powered cross-dataset leg (WECC 240-bus) is separate and in progress. The sentinel is review-only: it observes and seals, and never actuates.

Related: the honest false-alarm methodology in Early-Warning: Honest False-Alarm Evaluation and the first real-data case study ISO-NE Forced Oscillation.